70 



Mr. H. T. Fernald gave, not for publication, an informal review of 

 the work in past years in economic entomology in Pennsylvania. 



Mr. Howard, in discussion of Mr. Fernald's remarks, said that for 

 many years no reports of damage by the wheat midge had been received 

 at the Department of Agriculture in Washington, and asked for the 

 experience of other members of the association. 



Messrs. Smith and Johnson both stated that this insect was very rare, 

 or at least not troublesome in New Jersey and Maryland. Both speakers, 

 however, reported the great abundance of the Hessian fly the present 

 season in their respective States. 



Mr. A. H. Kirkland read the following paper- 



EXPERIMENTS WITH INSECTICIDES FOR THE GIPSY MOTH AND 



BROWN-TAIL MOTH. 



By A. H. Kirkland, Amherst, Mass. 



[Withdrawn for publication elsewhere.] 



Mr. W. B. Alwood presented the following papers: 



NOTES ON THE LIFE HISTORY OF THE WOOLLY APHIS OF APPLE.' 



(Schizoneura lanigera Haussman.) 



By Wm. B. Alwood, Blacksburg, Va. 



[Abstract of paper.] 



This well-known species was studied both in the field and in the green- 

 house, where breeding experiments were carried on in control colonies. 

 The common observations as to the identity of the root-feeding and 

 stem-feeding individuals were repeated, and the individuals colonized 

 from the roots upon stems and from the stems upon roots with perfect 

 success, and many observations of an incidental nature relating to the 

 ordinary life history of this species were recorded. 



The principal object of the breeding experiments was to furnish a rec- 

 ord of the generations which occur at this place and to study the wiuged 

 form and the sexual generation. It was hoped that we might settle 

 the part which the winged individuals play in the dissemination of the 

 species, and whether its perpetuation is dependent upon the sexual 

 generation ; also it was desired to make critical observations on the 

 overwintering of the agamic form. 



Observations on colonies in the orchard were begun in the autumn, 

 and colonies were also started in the greenhouse on potted plants. Col- 

 onies on unprotected stems in the orchard persisted all winter, but 



^his paper was prepared from observations made by the writer and Mr. W. M. 

 Scott while the latter was an assistant in the Virginia Polytechnic Institute. 



